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(Topic ID: 276016)

JP Premium- Is this the cause of my 50% ball launch failures?


By teksavy

60 days ago



Topic Stats

  • 10 posts
  • 7 Pinsiders participating
  • Latest reply 60 days ago by Chitownpinball
  • Topic is favorited by 2 Pinsiders

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#1 60 days ago

Hi all:

I'm trying to get a clear understanding of why my new Jurassic Park Premium is failing 50% of the ball launches- both from the automatic launcher as well as manual pull? Could this misaligned metal ramp be the issue?

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#2 60 days ago

What's the build date? Friday or Monday

#3 60 days ago

For me the fix was simple - put a washer underneath that ramp's left screw there. Solid now for me damn near every time whereas it was about 50/50 prior.

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#4 60 days ago

Man those 2 pics look very diff'rent! Why does the OPs look like the metal was put on a Grinder?

#5 60 days ago
Quoted from teksavy:

Hi all:
I'm trying to get a clear understanding of why my new Jurassic Park Premium is failing 50% of the ball launches- both from the automatic launcher as well as manual pull? Could this misaligned metal ramp be the issue?[quoted image]

It may not be the misalignment of the ramp. Well a part of the problem, but could be like TheLaw said: the cut of the metal ramp with a grinder. Wow looks like from two different companies or same company two different shifts.

#6 60 days ago

That junk around the edge wipes off - mine looked the same before some elbow grease

#7 60 days ago

Thank you everyone! I'll try the washer trick. Surprising for a brand new machine.

#8 60 days ago

We are all struggling with the Success rate for launch of the ball, and there are a few things folks have tried to help. The washer trick is one of the most successful mods which seems to help.

Related, I think Stern knew this area was a problem as theY mysteriously ship all machines with a weaker GREEN spring, rather that the ORANGE one in their specification. I can’t help but believe that they tried to increase ball launch success by removing some of the power of the shooter.

Or just coincidence?

#9 60 days ago

Why does it look like the metal fits so poorly in the routed out wood? Are all new Sterns like this?

#10 60 days ago
Quoted from teksavy:

Thank you everyone! I'll try the washer trick. Surprising for a brand new machine.

Do a slow motion video of the ball launch. That will help you out a lot. I had a bent ball guide that made the ball ricochet on a kiss once. Slo mo helped me out big time. Good luck!

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